[arch-general] pacman error: target not found

Dear Archers, I've been a happy Arch Linux user for years, but now I'm having trouble updating. Can anyone help? [root@archlinux huber]# pacman -Syu :: Synchronizing package databases... [...] :: Starting full system upgrade... :: Replace libwebkit with extra/webkitgtk2? [Y/n] [...] resolving dependencies... looking for inter-conflicts... warning: removing 'libgl' from target list because it conflicts with 'nvidia-utils' error: failed to prepare transaction (could not satisfy dependencies) :: nouveau-dri: requires libgl=9.0 [root@archlinux huber]# pacman -R nouveau-dri error: target not found: nouveau-dri How do I resolve this? Best, Mathias